/* $NetBSD: locore.h,v 1.12 2023/05/07 12:41:48 skrll Exp $ */
/*-
* Copyright (c) 2014 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Matt Thomas of 3am Software Foundry.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _RISCV_LOCORE_H_
#define _RISCV_LOCORE_H_
#include <sys/lwp.h>
#include <sys/userret.h>
#include <riscv/reg.h>
#include <riscv/sysreg.h>
#define FB_A0 0
#define FB_RA 1
#define FB_SP 2
#define FB_GP 3
#define FB_S0 4
#define FB_S1 5
#define FB_S2 6
#define FB_S3 7
#define FB_S4 8
#define FB_S5 9
#define FB_S6 10
#define FB_S7 11
#define FB_S8 12
#define FB_S9 13
#define FB_S10 14
#define FB_S11 15
#define FB_MAX 16
struct faultbuf {
register_t fb_reg[FB_MAX];
register_t fb_sr;
};
CTASSERT(sizeof(label_t) == sizeof(struct faultbuf));
#ifdef _KERNEL
extern int cpu_printfataltraps;
#ifdef FPE
extern const pcu_ops_t pcu_fpu_ops;
#endif
static inline vaddr_t
stack_align(vaddr_t sp)
{
return sp & ~STACK_ALIGNBYTES;
}
static inline void
userret(struct lwp *l)
{
mi_userret(l);
}
static inline void
fpu_load(void)
{
#ifdef FPE
pcu_load(&pcu_fpu_ops);
#endif
}
static inline void
fpu_save(lwp_t *l)
{
#ifdef FPE
pcu_save(&pcu_fpu_ops, l);
#endif
}
static inline void
fpu_discard(lwp_t *l)
{
#ifdef FPE
pcu_discard(&pcu_fpu_ops, l, false);
#endif
}
static inline void
fpu_replace(lwp_t *l)
{
#ifdef FPE
pcu_discard(&pcu_fpu_ops, l, true);
#endif
}
static inline bool
fpu_valid_p(lwp_t *l)
{
#ifdef FPE
return pcu_valid_p(&pcu_fpu_ops, l);
#else
return false;
#endif
}
void __syncicache(const void *, size_t);
int cpu_set_onfault(struct faultbuf *, register_t) __returns_twice;
void cpu_jump_onfault(struct trapframe *, const struct faultbuf *);
static inline void
cpu_unset_onfault(void)
{
curlwp->l_md.md_onfault = NULL;
}
static inline struct faultbuf *
cpu_disable_onfault(void)
{
struct faultbuf * const fb = curlwp->l_md.md_onfault;
curlwp->l_md.md_onfault = NULL;
return fb;
}
static inline void
cpu_enable_onfault(struct faultbuf *fb)
{
curlwp->l_md.md_onfault = fb;
}
void cpu_intr(struct trapframe */*tf*/, register_t /*epc*/,
register_t /*status*/, register_t /*cause*/);
void cpu_trap(struct trapframe */*tf*/, register_t /*epc*/,
register_t /*status*/, register_t /*cause*/,
register_t /*badvaddr*/);
void cpu_ast(struct trapframe *);
void cpu_fast_switchto(struct lwp *, int);
void lwp_trampoline(void);
void * cpu_sendsig_getframe(struct lwp *, int, bool *);
#endif
#endif /* _RISCV_LOCORE_H_ */